This morning, I opened my front door, walked 10 feet to the nearest tree (pictured here), wrapped a measuring tape around its trunk, snapped this picture, and simply uploaded the picture and trunk width online. THAT’s how simple it was to help the City of Philadelphia take an inventory of trees.

In the process, not only did I learn we have Honey Locust trees lining our street, but also that these trees provide ecological benefits to my region and save money -- a total of $318,804 saved per year.

Here’s how this works and why it’s important according to the software developers at Azavea:

PhillyTreeMap is an open-source, web-based map database of trees in the greater 13-county, three-state Philadelphia region. The wiki-style database enables non-profits, government, volunteer organizations, and the general public to collaboratively create an accurate and informative inventory of the trees in their communities. The project was funded by a USDA Small Business Innovation Research Grant, and is in support of the City of Philadelphia Department of Parks and Recreation’s 30% tree canopy goal, and the Pennsylvania Horticultural Society’s “Plant One Million” campaign. As more trees are added to the database, we are able to use software from the US Department of Agriculture to calculate the environmental impact of the region’s urban forest. So get outside and add some trees!